CSES - Datatähti 2022 alku - Results
Submission details
Task:Tietoverkko (Network)
Sender:mooc.fi~486604
Submission time:2021-10-06 12:15:54
Language:C++11
Status:READY
Result:10
Feedback
groupverdictscore
#1ACCEPTED10
#20
#30
Test results
testverdicttimegroup
#1ACCEPTED0.01 s1, 2, 3details
#20.08 s2, 3details
#30.25 s3details

Code

#include <iostream>
#include <vector>
#include <map>

using namespace std; 
int N;
vector<pair<int,int>> v[200000]; 
long long int sum;
int vasen=0; 
int oikea= 0; 
bool tama=false; 
map<pair<int, int>, int> juu;
vector<int> kerro;

void haku(int s, int e, long long int target){
    vasen++; 
    oikea++;

    for(auto u: v[s]){
        if(u.first!=e&&u.second==target){
            
            juu[{s, u.first}]=1;
            int temp1=vasen;
            int temp2= oikea; 
            vasen=0;
            haku(u.first, s, target);
            kerro.push_back(vasen);
            vasen=temp1;
            oikea=temp2;

            tama=true; }
        if(u.first!=e&&u.second>target) haku(u.first, s, target);
}
}
int main()
{     
    long long int c;
    int a ,b , i; 
    sum=0; 
    cin>>N; 
    vector<pair<int, int>> di; 
    vector<long long int> sro; 
  
    for(i=0; i<N-1; i++){
        cin>>a>>b>>c;
        di.push_back({a,b});
        sro.push_back(c);
        v[a].push_back({b,c});
        v[b].push_back({a,c}); //toisessa testissä 5000 ja miljardi, kolmannessa 200 000 ja miljardi. todennäköisesti 
        //johtuu siis miljardista.
    }
    int count=-1; 
    for(auto kl: di){
        count++; 
        int kaari=sro[count];
        if(juu[{kl.first,kl.second}]||juu[{kl.second,kl.first}])
            continue;
        vasen=0;
        haku(kl.first, kl.second , kaari);
        int kpp=vasen; 
        oikea=0;
        haku(kl.second, kl.first, kaari);
       
        
        juu[{kl.second, kl.first}]=1;
        if(tama){
            kerro.push_back(kpp);
            kerro.push_back(oikea);
            int maara=kerro.size();
            for(int ri=0; ri<maara; ri++){
         
                for( int rj=ri; rj<maara; rj++){
                    if(ri==rj) continue;
                  
                    sum+=kaari*kerro[ri]*kerro[rj];  }
                     }
            tama=false;
            kerro.clear();
            continue;
        }
        sum+= kaari*kpp*oikea;
    }


    cout<<sum;

  
    return 0;
}

Test details

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

input
100
1 2 74
1 3 100
2 4 50
3 5 40
...

correct output
88687

user output
88687

Test 2

Group: 2, 3

Verdict:

input
5000
1 2 613084013
1 3 832364259
2 4 411999902
3 5 989696303
...

correct output
1103702320243776

user output
1794100716608

Test 3

Group: 3

Verdict:

input
200000
1 2 613084013
1 3 832364259
2 4 411999902
3 5 989696303
...

correct output
1080549209850010931

user output
(empty)

Error:
terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc